Home / 5,615.84-8,420.16-2,331.20

Finding the Fourth Proportional to 5,615.84, 8,420.16 and 2,331.20

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Solution

The fourth proportional to 5,615.84, 8,420.16 and 2,331.20 is: 3,495.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.84 : 8,420.16 = 2,331.20 : x
  2. Step 2: Convert to fraction form
    5,615.84/8,420.16 = 2,331.20/x
  3. Step 3: Cross multiply
    5,615.84x = 8,420.16 × 2,331.20
  4. Step 4: Simplify right side
    5,615.84x = 19,629,076.99
  5. Step 5: Solve for x
    x = 19,629,076.99/5,615.84
  6. Step 6: Final answer
    x = 3,495.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.